Added missing declarations

src/arch/i386/include/undiload.h

  *
  */
 
+struct undi_device;
+struct undi_rom;
+
 extern int undi_load_pci ( struct undi_device *undi, struct undi_rom *undirom,
 			   unsigned int bus, unsigned int devfn );
 extern int undi_unload ( struct undi_device *undi );